diff options
author | Christian Cunningham <cc@localhost> | 2021-12-04 18:00:23 -0700 |
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committer | Christian Cunningham <cc@localhost> | 2021-12-04 18:00:23 -0700 |
commit | 51af35ffc632f7979fecc609445af8378466d405 (patch) | |
tree | b13f7fb24718d7efc1e7066d9835f85416d13a55 /src/util/mutex.c | |
parent | baac108e68f8861b01b118e97b149caa26a22e58 (diff) |
Created basic Mutex
Diffstat (limited to 'src/util/mutex.c')
-rw-r--r-- | src/util/mutex.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/util/mutex.c b/src/util/mutex.c new file mode 100644 index 0000000..86ffcf5 --- /dev/null +++ b/src/util/mutex.c @@ -0,0 +1,20 @@ +#include "../util/mutex.h" + +unsigned char lock_mutex(struct Mutex* m, unsigned long pid) { + if (m->pid == NULL_PID) { + m->pid = pid; + return 0; + } + return 1; +} + +// Eventually, there will need to be a hook into the scheduling mechanism +// that checks the currently running process and check that against the +// mutex's pid lock +unsigned char release_mutex(struct Mutex* m, unsigned long pid) { + if (m->pid == pid) { + m->pid = NULL_PID; + return 0; + } + return 1; +} |